Convertible 3.75% Senior Notes (Tables)

3 Months Ended

Mar. 31, 2016

Debt Disclosure [Abstract]

Convertible Debt [Table Text Block]

At March 31, 2016 and December 31, 2015, the net carrying amount of the Notes and the remaining unamortized debt discount were as follows:

	March 31,		December 31,
	2016		2015
	(in thousands)
Face amount of the Notes	$	143,750	$	143,750
Unamortized discount		34,950		36,759
Carrying amount of the Notes	$	108,800	$	106,991

Schedule of Long-term Debt Instruments [Table Text Block]

The assumptions used in connection with the valuation of the convertible option of the Notes issued December 16, 2014 utilizing the "with” and “without” method (discussed in Note 3) was as follows:

	Initial Measurement			Measurement			Measurement
	December 16,			December 31,			May 20,
	2014			2014			2015
Issue date		12/17/2014			12/17/2014			12/17/2014
Maturity date		12/15/2019			12/15/2019			12/15/2019
Term		4.99			4.92			4.57
Principal (millions)		143.75			143.75			143.75
Coupon		3.75	%		3.75	%		3.75	%
Seniority		Senior unsecured			Senior unsecured			Senior unsecured
Conversion shares		88.572			88.572			88.572
Conversion price	$	11.29		$	11.29		$	11.29
Stock price	$	9.45		$	8.80		$	5.73
Risk free rate		1.61	%		1.64	%		1.44	%
Volatility (rounded)		40.00	%		40.00	%		46.00	%

Interest Income and Interest Expense Disclosure [Table Text Block]

 For the three months ended March 31, 2016, and March 31, 2015, the Company recorded the following expenses in relation to the Notes:

	Three months ended
	March 31, 2016		March 31, 2015
	(in thousands)
Interest Expense at 3.75% coupon rate	$	1,347	$	1,348
Debt discount amortization		1,809		1,590
Amortization of deferred financing costs		197		173
Total interest expense (1)	$	3,353	$	3,111

(1) Included within "Interest and other expense, net" on the Consolidated Statements of Operations